淇河鲫鱼下咽骨形态学描述

观察成年淇河鲫鱼下咽骨形态特征,比较下咽骨与体型性差.选取58例成年淇河鲫鱼(雄24,雌34)3个体型变量、下咽骨4个形态变量及3个比值变量.测量数据处理采用SPSS 20.0软件.结果显示淇河鲫鱼体型变量性差有统计学意义(P0.05),性差方向是雌性大于雄性;下咽骨形态变量和比值变量性差无统计学意义(P0.05).主成分分析结果显示下咽骨7个变量可以提取3个因子,可以解释原始变量总变异的88.05%.反映了变量之间的关联程度.淇河鲫鱼体型变量性差显著,下咽骨性差无统计学意义;下咽骨变量提取的少数因子可以对多个自变量做出解释.

Sexual Dimorphism of Pharyngeal Bone of Qihe River Carassius Auratus

Sexual dimorphism of the pharyngeal bone in Carassius auratus from Qihe river was studied in the present study.The specimens of pharyngeal bone consisting of 58 adult individuals,including 24 females and 34males(weight range:(200±49)g),were selected.Three variables of external morphology,four variables of pharyngeal bone and three variables of ratios were measured.The data were analyzed with the Statistical Package for the Social Sciences(SPSS)version 20.0.For the population of Qihe Carassius auratus,the variables of external morphology was statistically significant(P<0.05),with morphology variables being smaller for males than for females;While there was no significant difference in sexual dimorphism between males and females for the variables of pharyngeal bone and variables of ratios.The result from PCA showed that seven variables of pharyngeal bone are extracted three factors that explained 88.05% of the variance of the original variables.Compared to sex determination of pharyngeal bone,there were significant sex differences in the variables of external morphology.Few factors which were extracted from pharyngeal bone could be explained by independent variables.